Door construction



July m, 1923.

N. PAINE DOOR CONSTRUCTION Filed Oct. 1921 FIGQflZ @444 if a?) ATTOQNEYWlTg/ESSES W Patented duly I9, 1923..

NATHAN PAINE, OF OSHROSH, WISCONSIN.

DOOR CONSTRUCTION.

Application filed October 7, 1921. Serial No. 506,162.

To all whom it may concern:

Be it' known that I, NATHAN PAINE, a citizen of the United States,andresident of Oshkosh, in the county of Winnebago and State ofWisconsin, have invented new and useful Improvements in DoorConstructions, of which the following is a description, reference beinghad to the accompanying drawings, which are a part of 131118specification.

This invention has for its object to provide a door with a miter jointthat can be manufactured by a machine operation and that will produce atight joint on both 1. sides.

In the manufacture of doors and the like very desirable ornamentaleffects may be produced by forming a mitered frame between the panel andthe outside frame, but

heretofore the difiiculty of making such mitered frame with tight jointson opposite faces has made such a door practically impossible as amachinemade product and consequently doors of this character have onlybeen made as fine examples of the cabinet-makers art. and, being of handwork, have been too expensive for ordinary building purposes.

The present invention, however, provides a door with a mitered jointthat can be readily made in an ordinary end-matching machine and thatwill have tight fitting joints formed in the opposite faces so as topresent an equally neat and ornamental appearance on both sides of thedoor.

With the above and other objects in view the invention consists in thedoor with a miter joint as herein claimed and all equivalents.

Referring to the accompanying drawings, in which like characters ofreference indicate the same parts in different views,

Figure 1 is a face view of one corner of a door with an inner framehaving a miter joint of this invention;

Figure 2 is a sectional view thereof;

Figure 3 is a view looking at the corner of the inner frame in line withthe miter joint, and

Figure 4 is a similar view with the members of the inner e se arated.

In these drawings, 10 lndicates the door outer frame, the parts of whichmay be mortised and doweled as usual, while 11 represents the innerframe, having a tongue 12 fitting in the groove of the outer frame. Theparts of the inner frame 11 are mitered together and enclose a panel 13,which fits in a groove 14 at the molded inner edge thereof, there beinga fillet of molding 15 along the shoulder formed between the inner frameand the thicker outer frame.

In making the miter joint both ends are formed alike with a surface 16normal to the opposite faces thereof except for a projecting tongue 17parallel with the faces and a groove 18 with one wall in continuation ofthe side of the tongue. When fitted together the tongue 17 of each endfits Within the groove 18 of the other and, as the two ends are exactlyalike with their re-- (sipective tongues and grooves at the sameistances from their opposite faces, they fit together in such a way thatsaid opposite faces of both ends are flush and meet with a true tightjoint. This operation of cutting the tongue and groove for the miterjoint may be performed on the ordinary end-matching machine with thework gage set at an angle of line of travel of the Work and, as the operation is the same for both ends of each piece, it constitutes a simplemill operation that does not materially increase the cost ofmanufacturing the door. The ornamental appearance of the mitered innerframe, however, adds greatly to the value of the door.

While the invention is particularly applicable to doors for buildings,it is also suitable for other door and panel structures.

What I claim as new and desire to secure by Letters Patent is:

door comprising an outer frame, an inner frame having a tongue andgroove connection therewith and formed of strips mitered together, saidinner frame being of material considerably thinner than the outer framewhereby projecting shoulders are produced, molding strips formingfillets along the shoulders, the inner edges of the strips forming theinner? frame bein molded and grooved, and a panel fitting in the groovethereof.

In testimony whereof I afiix m si ature.

NATHAN PIS NE,

with relation to the O IUD

